Given the following class Book, and a Person class as defined elsewhere,public class Book {private Person author;public Book () {author = null;}public Book(Person author) {this.author = author;}llother fields, constructors, and methods would be defined herepublic Person getAuthor() {return author;}public void setAuthor(Person author) {this.author = author;}//Student creates deepCopy method here}Write a method of Book called deepCopy that performs a deep copy of an instance of Book called b.

Answered: Given the following class Book, and a…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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What is the output of the following code? Convert the abstract class into an interface and modify the codes in all classes that will maintain the same output. (Rewrite the code)
Complete the following class to implement all the methods in the class: public class Person { String name; int birthYear; public Person() { name = "unknown"; birthYear = 2000; } public Person(String givenName, int yearOfBirth) { //put your implementation for this method } public String getName() { //put your implementation for this method } public String changeName(String newName) { //put your implementation for this method } public int getAgeInYears(int currentYear) { //put your implementation for this method } public static void main(String[] args) { //Create a new Person object called person1; name is Ahmed, and his birth year 1995 // Create a new Person object called person2; name is Rami, and his birth year 2000 //print the age of the first person } }
fix the code and remove compilation error
Incorrect Question 4 Consider public class Species { } // fields private String name; private int population; private double growthRate; // constructor public Species () { } name = "No Name Yet"; population = 0; growthRate = 33.3; Which of the following is the best setter method for the population instance variable? public boolean setPopulation(int newPopulation) { } if (newPopulation>= 0) { } population = newPopulation; return false; } return true; public public void setPopulation (int newPopulation) if (newPopulation>= 0) { } population newPopulation; public void setPopulation (int newPopulation) { population } = newPopulation;
3. Add a "DateOfBirth" property to the given Person class, which is of type "DateTime". 1 using System; 2 public class Person { public Person(string firstName, string lastName) { 3 4 FirstName = firstName; 5 LastName = lastName; } public string FirstName { get; set; } public string LastName { get; set; } public string GetFul1Name() { 7 8 10 return FirstName + + LastName; } 12 } 11 13 14 public class Program { public static void Main() { 15 16 } 18 } 17
java lang
class IndexItem { public: virtual int count() = 0; virtual void display()= 0; };class Book : public IndexItem { private: string title; string author; public: Book(string title, string author): title(title), author(author){} virtual int count(){ return 1; } virtual void display(){ /* YOU DO NOT NEED TO IMPLEMENT THIS FUNCTION */ } };class Category: public IndexItem { private: /* fill in the private member variables for the Category class below */ ? int count; public: Category(string name, string code): name(name), code(code){} /* Implement the count function below. Consider the use of the function as depicted in main() */ ? /* Implement the add function which fills the category with contents below. Consider the use of the function as depicted in main() */ ? virtualvoiddisplay(){ /* YOU DO NOT NEED TO IMPLEMENT THIS FUNCTION */ } };
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How to Define methods on a class?
Consider the following class public class Ketchup extends Food implements Tasty{ public String brand; private Snack snack; } Select ALL that are correct based this class. Ketchup is a Food Ketchup is a Tasty Ketchup is an Object Ketchup is a Snack Food is a Tasty Snack is a Tasty Food is a Snack
public class Cylinder { public void smoothen() { } } } public abstract class Vessel implements Steerable { private Engine e; } System.out.println("Smoothening.."); public Engine getEngine() { return e; } public void setEngine (Engine e) { this.e = e; } public abstract void turnOn(); public class Engine { private Cylinder [] y; private int cyls = 1; static final int maxCylinders = 12; public void addCylinder (Cylinder y) { if (cyls
Finish the constructor for the KickBall class. public class Ball { public double diameter; public Ball(double diam) { diameter = diam; public class KickBall extends Ball private Color ballColor; public KickBall(double diam, Color ballColor) {

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